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qTox/widget/netcamview.cpp

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#include "netcamview.h"
NetCamView::NetCamView(QWidget* parent)
: QWidget(parent), displayLabel{new QLabel},
mainLayout{new QHBoxLayout()}
{
setLayout(mainLayout);
setWindowTitle("Tox video");
setMinimumSize(320,240);
displayLabel->setScaledContents(true);
mainLayout->addWidget(displayLabel);
}
void NetCamView::updateDisplay(vpx_image frame)
{
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int w = frame.d_w, h = frame.d_h;
int bpl = frame.stride[VPX_PLANE_Y], cxbpl = frame.stride[VPX_PLANE_V];
QImage img(w, h, QImage::Format_RGB32);
uint8_t* yData = frame.planes[VPX_PLANE_Y];
uint8_t* uData = frame.planes[VPX_PLANE_V];
uint8_t* vData = frame.planes[VPX_PLANE_U];
for (int i = 0; i< h; i++)
{
uint32_t* scanline = (uint32_t*)img.scanLine(i);
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for (int j=0; j < w; j++)
{
float Y = yData[i*bpl + j];
float U = uData[i*cxbpl/2 + j/2];
float V = vData[i*cxbpl/2 + j/2];
uint8_t R = qMax(qMin((int)(Y + 1.402 * (V - 128)),255),0);
uint8_t G = qMax(qMin((int)(Y - 0.344 * (U - 128) - 0.714 * (V - 128)),255),0);
uint8_t B = qMax(qMin((int)(Y + 1.772 * (U - 128)),255),0);
scanline[j] = (0xFF<<24) + (R<<16) + (G<<8) + B;
}
}
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lastFrame = img;
displayLabel->setPixmap(QPixmap::fromImage(img));
}